I don't not support Beyonce's social issues advocation as I don't view it as genuine, BUT:
If you want her to support everything, how far does the list go?
If you want to support one social issue, does that mean you have to speak up for blind people, deaf people, white people, black people, asians, muslims, christians, africans, retarded people, mental illness, gay, trans, bi.... how far does the list go on?
Who has the time to publicly speak up on every single social issue in the world
